Hybrid/EV Battery Pack Coolant Temperature Sensor A/B Correlation

Where it lives

For P2D2B, start at the sensor the description names.

Check these first

• Battery pack coolant temperature sensor A and B disagreeing
• Air in the battery pack coolant loop
• One pack coolant temperature sensor drifting
• A wiring fault on a pack coolant sensor
• A low battery pack coolant level

What to do next

1. Compare battery pack coolant temperature sensor A and B on a scan tool
2. Check the battery pack coolant level and bleed air
3. Inspect the pack coolant sensor wiring
4. Measure each pack coolant sensor resistance
5. Replace the drifting sensor
6. Clear the code and retest

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